Philips mutambi prototype, Elektuur magazine No. 188, June 1979,
Iyo compact disc ine makore makumi mana, uye kune avo vedu vanorangarira kuti yakatanga sei, inoramba iri budiriro isinganzwisisike yehunyanzvi hwepamusoro kunyangwe iyo yepakati yakasundidzirwa parutivi nekurwiswa kwemasevhisi ekutepfenyura.
Kana iwe ukagadzirira kuona nguva iyo tekinoroji yedhijitari yakatanga kudzinga tekinoroji yeanalog mumagetsi evatengi, inogona kunge iri kutaridzika kweCD. Pakati pemakumi manomwe, iyo yainyanya kudiwa yemagetsi hardware yaive analog vhidhiyo rekodha uye CB redhiyo, asi nekuburitswa kwemakomputa ekutanga epamba uye vatambi velaser, zviroto zveavo vaivavarira kuve "pamhepo yemafungu" zvakangoerekana zvachinja. . Iyo CD inoridza yakave yekutanga imba yemagetsi mudziyo une, kunyangwe idiki, laser chaiyo, iyo yakazoratidzika sechinhu chakanakisa, zvakanaka, chisiri chaicho. Nhasi, matekinoroji matsva anopinda mumusika haabudisi mhedzisiro yakadaro: anoonekwa sechimwe chinhu chinooneka uye chinonyangarika "nenzira yacho pachayo."
Akabvepi?
"Makumbo" efomati akakura kubva kune ichangoburwa nzira dzekurekodha vhidhiyo yenguva iyoyo, iyo vagadziri vakatsvagawo kugadzirisa kune yepamusoro-mhando yekurekodha. Sony yakaedza kugadzirisa rekodhi rekodhi rekodhi rekodhi, uye Philips akaedza kurekodha ruzha mune analogi fomu pane optical discs, yakafanana neayo akange atoshandiswa kuchengeta vhidhiyo. Ipapo mainjiniya kubva kumakambani maviri akauya kumhedziso yekuti zvaive nani kurekodha pane optical disc, asi mune yedhijitari fomu. Nhasi izvi "asi" zvinoratidzika sezviri pachena, asi kare ikako hazvina kuitika pakarepo. Mushure mekugadzira mafomati maviri asingaenderane asi akafanana zvakanyanya, Sony naPhilips vakatanga kushandira pamwe, uye pakazosvika 1979 vaive vaunza prototypes yemutambi nedhisiki re120mm rine inopfuura awa ye16-bit stereo ruzha pamwero wesampling we44,1 kHz. Muzvinyorwa zvesainzi zvakakurumbira uye magazini, tekinoroji nyowani yakanzi incredible futurism, ichiwedzeredza kugona kwayo. Zviratidziro zvepaTV zvakavimbisa kuti madhisiki aya βasingazoparadzwiβ kana achienzaniswa nemarekodhi evinyl, izvo zvakawedzera kufarira iwo. Mutambi wePhilips wepamusoro-soro, aipenya nekasilvha, aitaridzika zvinoshamisa, asi mhando dzekutanga dzemidziyo iyi dzakarova masherufu ezvitoro muna 1982 chete.
Anoshanda sei?
Kunyange zvazvo vashandisi vakafunga kuti nheyo yekushanda yeCD player yakanyanyisa uye isinganzwisisike, chaizvoizvo, zvinhu zvose zvinoshamisa uye zvakajeka. Kunyanya zvichienzaniswa neanalog VCRs iyo vazhinji vevatambi ava vakagara padivi payo. Pakupera kwemakumi masere, vachishandisa muenzaniso wePCD mudziyo, vakatotsanangura nyaya dzakasiyana siyana kune vagadziri vemagetsi emangwana. Panguva iyoyo, vazhinji vaitoziva kuti chimiro ichi chaive chii, asi havasi vese vaigona kutenga mutambi akadaro.
Musoro wekuverenga weCD drive une zvikamu zvishoma zvinoshamisa zvinofamba. Iyo module, iyo inosanganisira ese ari maviri sosi uye anogamuchira, inofambiswa nediki yemagetsi mota kuburikidza negiya rehonye. Iyo IR laser inopenya kuita prism inotaridza danda pakona ye90 Β°. Iyo lens inotarisisa iyo, uye ipapo iyo, inoratidzwa kubva kudhisiki, inodzokera kumashure kuburikidza neiyo lenzi muprism, asi panguva ino haishandure kutungamira kwayo uye inosvika kune mana akatevedzana mafotodiode. Iyo yekutarisisa mechanicha ine magineti uye mahwindi. Nekutevera kwakaringana uye kutarisisa, iyo yakanyanya radiation kusimba inowanikwa pakati peiyo array; kutyorwa kwekutevera kunokonzera kutamiswa kwenzvimbo, uye kutyorwa kwekutarisa kunokonzera kuwedzera kwayo. Automation inogadzirisa nzvimbo yemusoro wekuverenga, kutarisa uye kukurumidza, kuitira kuti kubudiswa kuve chiratidzo cheanalog, kubva kune iyo data yedhijitari inogona kutorwa nekukurumidza kunodiwa.
Kuverenga musoro mudziyo une tsananguro,
Bits inosanganiswa kuita mafuremu, kune iyo modulation inoshandiswa panguva yekurekodha , iyo inokubvumira kuti udzivise zero imwe chete uye imwe, semuenzaniso, kutevedzana 000100010010000100 inova 111000011100000111. Mushure mokupfuura mapuranga kuburikidza netafura yekutarisa, 16-bit data stream inowanikwa, inosangana neReed-Solomon kugadziriswa uye kusvika paDAC. Kunyangwe vagadziri vakasiyana vakaita shanduko dzakasiyana siyana kune ino system mumakore ekuvapo kwefomati, chikamu chikuru chechishandiso chakaramba chiri nyore kwazvo optical-electronic unit.
Chii chakazoitika kwaari?
Mumakore makumi mapfumbamwe, chimiro chakashanduka kubva pakunaka uye nemukurumbira kuenda kuhuwandu. Vatambi vave nemutengo wakaderera, uye mhando dzinotakurika dzapinda mumusika. Vatambi vemadhisiki vakatanga kubvisa vatambi vekaseti muhomwe. Chinhu chimwe chete chakaitika neCD-ROM, uye muhafu yechipiri yemakumi mapfumbamwe zvakanga zvakaoma kufungidzira PC itsva isina CD drive uye encyclopedia yemultimedia yakabatanidzwa. Iyo Vist 1000HM yakanga iri imwe cheteyo - komputa inoyevedza ine masipika akasanganiswa mumonitor, VHF inogamuchira uye compact IR keyboard ine yakavakirwa-mukati joystick, inoyeuchidza kure kure kwenzvimbo yemimhanzi. Muzhinji, akadanidzira nechimiro chake chese kuti nzvimbo yake yakanga isiri muhofisi, asi muimba yekutandarira, uye aitora nzvimbo inogarwa neimba yemimhanzi. Yakanga ichiperekedzwa nedhisiki kubva kuboka reNautilus Pompilius rine nziyo mune ina-bit monophonic WAV mafaira akatora nzvimbo shoma. Paive zvakare nemimwe michina yakakosha yaishandisa maCD senzira yekuchengetera data, semuenzaniso, Philips CD-i uye Commodore Amiga CDTV, pamwe neVhidhiyo CD player, iyo Sega Mega CD mudziyo weMega Drive/Genesis consoles, 3DO consoles uye Play. Chiteshi (chekutanga) ...
Commodore Amiga CDTV,
Iyo Vist Black Jack II komputa, inotaridzika isina kusiyana neVist 1000HM,
Uye apo vamwe, vachitevera vapfumi, vakanga vachigona zvose izvi, nyaya itsva yakanga iri pachirongwa: kukwanisa kurekodha maCD kumba. Yainhuwa senganonyorwa zvakare. Varidzi vashomanana vanofara vemadhiraivha anopisa vakaedza kuabhadharira nekutumira zviziviso: βNdichaita backup yehard drive yako paCD, zvisingadhure.β Izvi zvakapindirana nekuuya kweiyo compressed audio format MP3, uye yekutanga MPMan uye Diamond Rio vatambi vakaburitswa. Asi vakashandisa inodhura flash memory panguva iyoyo, asi iyo Lenoxx MP-786 CD yakave yakarova chaiyo - uye yakanyatsoverenga ese akanyorwa ega uye akagadzirira-akagadzira disc ane MP3 mafaera. Napster nezvimwe zviwanikwa zvakakurumidza kuwira makambani ekurekodha, avo, zvakadaro, vaive vakatarisa chimiro chitsva panguva imwe chete. Imwe yekutanga MP3 discs ine rezinesi yakaburitswa neboka re "Crematorium", uye yaiwanzoteererwa pane mutambi uyu. Uye muturikiri kunyange akambova nemukana wekukwira mukati memumwe wevatambi ava uye kugadzirisa kukanganisa kwakakonzera kuti disc ibate chivharo. Kuburitswa kweApple kwemaiPod ekutanga, izvo zvakaita kuti zvikwanise kutenga maalbum kuburikidza neyakajeka interface pakombiyuta skrini, zvakakurudzira vaparidzi vemimhanzi kuti vazopedzisira vabva pakurwisa mafomati akadzvanywa kuenda kunotora mabhenefiti kubva kwavari. Ipapo iyo smartphone yakapotsa yaisa ega ega MP3 player kunze kwekushandisa nekukurumidza kupfuura iyo yaakambotsiva maCD, nepo vinyl nemakaseti ave kumutsiridzwa. CD rakafa here? Zvichida kwete, sezvo kugadzirwa kwemadhiraivha uye midhiya hakuna kupera zvachose. Uye zvinogoneka kuti iyo nyowani wave ye nostalgia ichamutsidzira iyi fomati.
Source: www.habr.com